William, the duke of Normandy: 1048 to 1060
Bad move! Frenchmen will rally to their king's defense, when he is attacked by one of their over-ambitious peers. Is your pride so great, that you forgot that the rest of France looks upon Normandy as little better than barbaric? It is that Viking stigma you lot have still to live down. To allow a Norman "land pirate" to invade the Īle de France would be an attrocity: not even your father-in-law will help you do that.
Since you persisted in this reckless course, the only thing history will remember you by is William the (foolhardy) Bastard. (Yes, you died, you berserk madman, you.)